The speed of the oxygen evolution reaction seriously affects the hydrogen production ef-ficiency of water electrolysis. Hence it is crucial to develop efficient and durable OER electrocatalysts. Construction of heterojunction catalysts is also one of the strategies to develop efficient catalysts. In this paper, a pea-like Cu/Cu2S-C3 Mott-Schottky electro-catalyst was self-constructed by vapor deposition, while CF (copper foam) was used as substrate material and copper source, and thiourea was served as sulfur source. The built-in electric field is formed at the metal-semiconductor interface, which endows it with promising electrocatalytic performance. As the working electrode, the overpotentials of Cu/Cu2S-C3 required to reach the current density of 10 and 50 mA cm-2 were about 170 and 335 mV. The impact of the Mott-Schottky structure on the catalyst was also reflected in stability. The i-t tests of the sample Cu/Cu2S-C3 were carried out under 10 and 60 mA cm-2 and performed well.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
展开▼
机译：析氧反应的速度严重影响水电解的产氢效率。因此，开发高效耐用的OER电催化剂至关重要。异质结催化剂的构建也是开发高效催化剂的策略之一。本文采用气相沉积法自构了一种豌豆状Cu/Cu2S-C3 Mott-Schottky电催化剂，以CF（Copper 泡沫铜）为衬底材料和铜源，硫脲为硫源。在金属-半导体界面处形成内置电场，这赋予了它良好的电催化性能。作为工作电极，达到10和50 mA cm-2电流密度所需的Cu/Cu2S-C3过电位约为170和335 mV。莫特-肖特基结构对催化剂的影响也体现在稳定性上。样品Cu/Cu2S-C3在10和60 mA cm-2下进行了i-t测试，表现良好。（c） 2022 Hydrogen Energy Publications LLC. 由 Elsevier Ltd. 出版。保留所有权利。
展开▼
